Quick Summary
HTW-WF01-FC-4EW is a smart wifi thermostat for 4-pipe fan coil systems. It controls a 3-speed fan and separate heating and cooling on/off valves. It supports an external sensor for better temperature feedback. Wi-Fi, voice control, and weekly programming help daily room control stay simple and steady.
This page explains what the main functions mean in real projects. It shows the control logic, key parameters, and common questions clearly. We also outline possible project adjustments when standard versions are not enough. This helps engineers and buyers check fit before choosing a model.
Key Functional Highlights
(This section explains how this smart wifi thermostat improves control stability and daily operation in 4-pipe fan coil systems.)
(01) 3-speed fan control
This smart wifi thermostat controls a 3-speed fan that helps match airflow to the room load. This improves comfort without running the fan harder than needed. It also helps reduce noise, energy use, and daily wear.
(02) 4-pipe on/off valve control
Separate heating and cooling valve outputs suit 4-pipe systems well. This gives clear changeover logic for year-round room conditioning. It also helps commissioning teams keep control behaviour simple and reliable.
(03) External sensor support
An external sensor helps when the wall position is not ideal. It can improve temperature reading in larger or uneven spaces. This supports steadier control and fewer comfort complaints during use.
(04) Wi-Fi (App / voice control)
Wi-Fi gives remote access through the app and voice platforms. As a smart wifi thermostat, it helps daily adjustment without site visits. This is useful for homes, apartments, and light commercial rooms.
(05) Programmable
Programmable schedules reduce repeated manual changes during the week. This helps keep rooms comfortable at expected times automatically. It also supports more consistent operation and better energy control.
Product Design and Display
(This section presents the physical design, screen interface, and installation layout of this smart wifi thermostat model.)
Technical Specifications
(This section outlines the key technical parameters that define how this smart wifi thermostat performs in real applications.)
| Parameter | Value |
|---|---|
| Power Supply | 95~240Vac, 50/60Hz |
| Current Load | Fan Relay 5A; Valve Relay 5A |
| Built-in Sensor | NTC3950, 10K |
| Temperature Accuracy | ±0.5°C |
| Set-Point Range | 5~35°C |
| Protection Class | IP20 |
| Warranty | 2 Year |
| Installation Box | EU round box or Standard 86x86mm Box |
Wiring Diagram
(This section shows how this smart wifi thermostat is wired within a typical 4-pipe fan coil control system.)
Model Code Guide
(This section explains how the smart wifi thermostat model code defines system type, control method, and optional functions.)
| Code HTW-WF01-FC-xx | Meaning |
|---|---|
| FC | Fan coil thermostat series |
| EC | EC fan |
| 2/4 | 2 for 2-pipe on/off; 4 for 4-pipe on/off system |
| M | Modulating valve control |
| W | Wi-Fi |
| N/B | N for Modbus; B for BACnet |
| K/E | K for Keycard; E for External sensor |
| 24 | Powered by 24V, or with 24V output for 0-10V valve |
| Example: HTW-WF01-FC-4EW stands for a 4-pipe on/off model with external sensor support and Wi-Fi. Most sub-models are ready-made. Please feel free to get in touch with us to confirm availability. | |
Project Fit & Customization
(This section explains where this smart wifi thermostat may not fit, and what project adjustments can be considered.)
This version is not made for BMS projects in larger buildings that need Modbus or BACnet integration. It is also not designed for EC fan control, 0-10V valves, 24V-only systems, or BMS polling. If a site needs central supervision, special interface demands, or unusual control sequences, another version may fit better.
Despite these limits, we can discuss ODM changes around real project needs and application targets. We may evaluate Modbus, BACnet, EC fan control, 24V power, different housings, or adjusted logic. The final scope depends on hardware feasibility, software work, testing time, and sensible order quantity.
We also support OEM work for branding, product presentation, and market-specific packaging needs. This may include logo printing, label updates, colour changes, package artwork, manuals, or carton marks. Please feel free to get in touch with us, and we will review suitable options together.
Certificates and Compliance
(This thermostat complies with European market requirements and is supported by certifications such as CE, RoHS, LVD test reports, EMC test reports, etc)
Exhibition Moments
(Our team regularly participates in international HVAC exhibitions such as Febrava in Brazil, The Big 5 in Dubai, and ISK-SODEX in Turkey, etc.)
Frequently Asked Questions
Q1: Is HTW-WF01-FC-4EW suitable for a 4-pipe fan coil system?
Yes, this model is made for 4-pipe fan coil applications. It controls one 3-speed fan and separate heating and cooling on/off valves. This makes room-side control clear and practical for daily operation.
Q2: Can this model connect to a BMS system?
The standard version does not support Modbus or BACnet communication. It is mainly for local control and Wi-Fi use. For BMS projects, we can discuss other versions or possible custom options.
Q3: When should we use the external sensor function?
An external sensor is useful when the wall location does not reflect room temperature well. It can also help in larger rooms or uneven spaces. This often improves comfort and keeps control more stable.
Q4: Does the programmable function help in daily use?
Yes, the smart wifi thermostat can follow time schedules during the week. This reduces repeated manual adjustment and keeps operation more consistent. It is helpful where rooms follow regular daily routines.
Q5: What is the MOQ and can we get samples?
We support samples for testing and evaluation first. The usual MOQ is 300 units. Smaller trial quantities, such as 100 units, may also be discussed.
Q6: How do we place an order and arrange shipment terms?
Please feel free to get in touch with us and share your project needs. We will confirm details and provide a PI. Payment can support TT, PayPal, Visa, and terms such as EXW, FOB, or DAP.
Q7: How long does product preparation usually take?
Standard non-custom samples are usually sent within 7 days. If custom work is needed, we need to review quantity and functions first. In many cases, custom preparation takes 3 to 5 weeks, and around 300 units often need about one month.
Q8: How can the goods be shipped?
Courier delivery is often the most practical option. FedEx, DHL, or UPS usually takes about 7 days to door. Air freight is also around 7 days, while sea freight is usually about one month or more.
Need Help Choosing the Right Model?
If you are comparing more than one smart wifi thermostat, please feel free to get in touch with us. We can help review your application and suggest a suitable version.
Related Thermostat Models
For more details, please click here directly: Wi-Fi Thermostats | Modbus Thermostats | BACnet Thermostats
Final Note
Fan coil projects usually need steady room control, simple operation, and easy daily management. This smart wifi thermostat handles fan coil control with valve switching and flexible remote access. It helps support stable comfort, smoother operation, and more convenient facility management.
